[tex]4 {x}^{2} - 9 = 7 \\ 4 {x}^{2} = 7 + 9 \\ 4 {x}^{2} = 16 \\ {x}^{2} = 4 \\ x = ±2 \\ x = - 2 \\ x = 2[/tex]
Respuesta:
[tex] x_{1} = - 2 . \: \: \: x_{2} = 2 [/tex]
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Verified answer
[tex]4 {x}^{2} - 9 = 7 \\ 4 {x}^{2} = 7 + 9 \\ 4 {x}^{2} = 16 \\ {x}^{2} = 4 \\ x = ±2 \\ x = - 2 \\ x = 2[/tex]
Respuesta:
[tex] x_{1} = - 2 . \: \: \: x_{2} = 2 [/tex]